@mixin image-rendering($mode:auto) {

    @if ($mode == crisp-edges) {
        -ms-interpolation-mode: nearest-neighbor; // IE8+
        image-rendering: -moz-crisp-edges;
        image-rendering: -o-crisp-edges;
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    } @else {
        image-rendering: $mode;
    }
}